If you are a retailer and you want to be included in ShopSavvy you can always use Google Base.  If you don’t want to use Base you can always build an API.  Here is the standard spec:

[REQUEST]

http://api.provider.com?barcode=012345543210

[RESPONSE]
<Response>
<Product>
<Title>Toothbrush ABC</Title>
<Image>http://www.acme.com/pic1.jpg</Image>
<Image>http://www.acme.com/pic2.jpg</Image>
<Image>http://www.acme.com/pic3.jpg</Image>
</Product>
<Offers>
<Offer>
<Merchant>ACME</Merchant>
<Quality>New/Used</Quality>
<Price currency=”USDollars”>14.99</Price>
<Link>http://www.acme.com/product/123</Link>
</Offer>
<Offer>
<Merchant>Store XYZ</Merchant>
<Quality>New/Used</Quality>
<Price currency=”USDollars”>14.99</Price>
<Link>http://www.storexyz.com/product/123</Link>
</Offer>
<Offer>
<Merchant>123 Store</Merchant>
<Quality>New/Used</Quality>
<Price currency=”USDollars”>14.99</Price>
<Link>http://www.123Store.com/product/123</Link>
</Offer>
</Offers>
</Response>